*{
    margin: 0;
    padding: 0;
    list-style: none;
    border-radius: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden; /* 防止出现滚动条 */
}

.wrapper {
    display: flex;
    flex-direction: column;
    height: 100%;
}


.wrapper>header{
    height: 50px;
    padding: 5px;
    background-color: #333;
}

.wrapper>header>*{
    display: inline-block;
    vertical-align: middle;
    margin-left: 1%;
}

.logo-img img{
    margin-top: 5px;
    height: 30px;
}

.logo-text{
    color: #fff;
    font-size: 1.2em;
    letter-spacing: 2px;
    margin-top: 5px;
}

section{
    width: 100%;
    flex: 1;
}

section>*{
    float: left;
}

section>.nav{
    background: #222;
    width: 15%;
    height: 100%;
}

.nav dt{
    color: #bbb;
    font-size: 0.9em;
    margin-top: 30px;
    padding-left: 10px;
    margin-bottom: 8px;
}

.nav dd{
    font-size: 1em;
    height: 42px;
    width: 100%;
    line-height: 42px;
    padding-left: 20px;

}
.nav dd>span{
    padding-right: 5px;

}

section>.content{

    width: 85%;
    height: 100%;
}

.nav dd:hover{
    color: #fff;
    cursor: pointer;
    background-color: #555;
}

.no-focus{
    color: #bbb;
}

.focus{
    color: #fff;
    background-color: #777;
}

iframe{
    width: 100%;
    height: 100%;
    outline: none;
    border: 0;
}